/*
 * Copyright (C) 2005 - 2013 MaNGOS <http://www.getmangos.com/>
 *
 * Copyright (C) 2008 - 2013 Trinity <http://www.trinitycore.org/>
 *
 * Copyright (C) 2010 - 2013 ProjectSkyfire <http://www.projectskyfire.org/>
 *
 * Copyright (C) 2011 - 2013 ArkCORE <http://www.arkania.net/>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include <ace/Singleton.h>
#include <ace/Thread_Mutex.h>
#include <ace/Log_Msg.h>

#include "DelayExecutor.h"

DelayExecutor* DelayExecutor::instance() {
    return ACE_Singleton<DelayExecutor, ACE_Thread_Mutex>::instance();
}

DelayExecutor::DelayExecutor() :
        pre_svc_hook_(0), post_svc_hook_(0), activated_(false) {
}

DelayExecutor::~DelayExecutor() {
    if (pre_svc_hook_)
        delete pre_svc_hook_;

    if (post_svc_hook_)
        delete post_svc_hook_;

    deactivate();
}

int DelayExecutor::deactivate() {
    if (!activated())
        return -1;

    activated(false);
    queue_.queue()->deactivate();
    wait();

    return 0;
}

int DelayExecutor::svc() {
    if (pre_svc_hook_)
        pre_svc_hook_->call();

    for (;;) {
        ACE_Method_Request* rq = queue_.dequeue();

        if (!rq)
            break;

        rq->call();
        delete rq;
    }

    if (post_svc_hook_)
        post_svc_hook_->call();

    return 0;
}

int DelayExecutor::activate(int num_threads, ACE_Method_Request* pre_svc_hook,
        ACE_Method_Request* post_svc_hook) {
    if (activated())
        return -1;

    if (num_threads < 1)
        return -1;

    if (pre_svc_hook_)
        delete pre_svc_hook_;

    if (post_svc_hook_)
        delete post_svc_hook_;

    pre_svc_hook_ = pre_svc_hook;
    post_svc_hook_ = post_svc_hook;

    queue_.queue()->activate();

    if (ACE_Task_Base::activate(THR_NEW_LWP | THR_JOINABLE | THR_INHERIT_SCHED,
            num_threads) == -1)
        return -1;

    activated(true);

    return true;
}

int DelayExecutor::execute(ACE_Method_Request* new_req) {
    if (new_req == NULL)
        return -1;

    if (queue_.enqueue(new_req, (ACE_Time_Value*) &ACE_Time_Value::zero)
            == -1) {
        delete new_req;
        ACE_ERROR_RETURN(
                (LM_ERROR, ACE_TEXT("(%t) %p\n"), ACE_TEXT("DelayExecutor::execute enqueue")),
                -1);
    }

    return 0;
}

bool DelayExecutor::activated() {
    return activated_;
}

void DelayExecutor::activated(bool s) {
    activated_ = s;
}
